An object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Initial Velocity:0.00 px/frame
Applied Force:0 N
Final Velocity:0.00 px/frame
Real World Example:
When a car suddenly stops, passengers continue moving forward due to inertia. Seat belts provide the unbalanced force that stops this motion.
Force, Mass & Acceleration
A continuous force from the spacecraft's engine will cause it to accelerate. A larger mass requires more force for the same acceleration.
Initial Velocity:0.00 m/s
Applied Force:2000 N
Acceleration:2.00 m/s²
Final Velocity:0.00 m/s
Real World Example:
Pushing a shopping cart: a light cart accelerates quickly with little force, while a full cart needs more force to achieve the same acceleration.
Action-Reaction
When two spacecraft modules separate, the force pushing them apart results in equal and opposite momentum changes.
Module 1 Velocity: 0.00 m/s
Module 2 Velocity: 0.00 m/s
Real World Example:
When you jump off a small boat, the boat moves backward as you move forward. The force you apply to the boat is equal to the force the boat applies to you.
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Newton's Laws of Motion
First Law: Law of Inertia
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Explanation:
This law describes the tendency of objects to resist changes in their state of motion. The amount of inertia an object has depends on its mass - the greater the mass, the greater the inertia.
Examples:
A soccer ball continues rolling until friction and gravity stop it
Passengers lurch forward when a car suddenly stops
It's harder to push a heavy box than a light one
Formula:
When net force = 0, acceleration = 0
Second Law: F = ma
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
Explanation:
This law quantifies how forces cause changes in motion. The direction of the acceleration is in the direction of the applied net force.
Examples:
Pushing a car requires more force than pushing a bicycle
A rocket accelerates faster as it burns fuel and loses mass
It's easier to accelerate an empty shopping cart than a full one
Formula:
F = m × a (Force = mass × acceleration)
Third Law: Action-Reaction
For every action, there is an equal and opposite reaction.
Explanation:
This law states that forces always occur in pairs. If object A exerts a force on object B, then object B simultaneously exerts an equal and opposite force on object A.
Examples:
A rocket pushes exhaust gases downward, and the gases push the rocket upward
When you swim, you push water backward, and the water pushes you forward
Walking: your foot pushes backward on the ground, and the ground pushes you forward
Formula:
FAB = -FBA (The force of A on B equals the negative of the force of B on A)